Herbs annual. Roots fibrous. Stems prostrate, yellowish, slender, 10--30 cm, brown glandular villous. Petiole 2--5 mm; leaf blade elliptic or ovate, 5--10 × 3--5 mm, thin, both surfaces tuberculate, midvein raised, base cuneate, margin sparsely hairy, apex acute. Cymes few flowered; bracts narrowly ovate, 3--5 × 1--3 mm, base cuneate, apex acute. Pedicel slender, 0.5--1.5 cm, glandular pubescent. Sepals 5, lanceolate, 1--3 × ca. 1 mm, nodose glandular pubescent abaxially, base broadened, margin narrowly membranous, ciliate, apex acute. Petals 5, white, obovate, equaling or slightly longer than sepals, apex dentate lobed. Stamens 10; anthers yellow. Ovary subglobose, ca. 1.5 mm in diam. Styles 3, ca. 4 mm. Fl. Jul--Aug.
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